RE: mls qos use policy-map for marking

Hi Bao,

Instead of a YES/NO answer I want you to spend a couple of hours on the
following link:

http://www.cisco.com/en/US/products/hw/switches/ps646/products_tech_note09186
a00800feff5.shtml

Believe me; rarely does Cisco develop such a nice article.

--------------------------
Kambiz Agahian
CCIE (R&S)
CCSI, WAASSE, RSSSE
Technical Instructor
CCBOOTCAMP - Cisco Learning Solutions Partner (CLSP)
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-----Original Message-----
From: nobody_at_groupstudy.com on behalf of Bao Bao Chou
Sent: Tue 4/20/2010 10:50 PM
To: ccielab_at_groupstudy.com
Subject: mls qos use policy-map for marking

Hi Group Study experts

Recently i tested use policy-map for marking on my 3550 switch. And found some
problems.

First, i configured a class map to match all the traffic, and use policy-map
to match that class to set dscp EF. Then i applied that policy map to the
incoming direction of an access port(layer 2), which is connected to a router.
After that i tried generate some traffic from the router, and then on the
switch, i found there is nothing matched when i tried "show policy-map
interface".

but after i changed the switch port to a layer 3 port, the marking is
successfully done.

so i am wondering policy-map marking is only working on a layer 3 port. Please
help me to confirm it. Thanks a lot.

And by the way, what is the meaning if i put "mls qos trust dscp " on a trunk
port?? since trunk port is a layer 2 port, it wont check layer 3 portion, is
it??
Received on Tue Apr 20 2010 - 23:27:37 ART